Vertiv EXM 0080kTK16FN01000, Руководство пользователя

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Chapter 1 Overview 5
Liebert EXM 80kVA ~ 200kVA UPS User Manual
3. The total load of the parallel system can be queried from each UPS module's TOUCHSCREEN.
1.3.2 Parallel System Requirements
A group of paralleled modules behave as if it were one large UPS with the advantage of presenting higher
reliability. To ensure that all modules are equally utilised and to comply with relevant wiring rules, the
following requirements apply:
1. All UPS modules must be the same series, and connect to the same bypass source.
2. The N line of bypass and rectifier input sources must be connected to the same neutral line terminal.
3. Any RCD, if installed, must be of an appropriate setting and located upstream of the common neutral
line input terminal. Alternatively, the device must monitor the protective earth current of the system. Refer
to
Warning: high earth leakage current before Contents .
4. For parallel system consists of two or more UPS modules, the bypass load sharing inductors (optional)
should be selected.
1.4 Operation Modes
The UPS has the following operation modes:

Normal mode

Battery mode

Automatic restart mode

Bypass mode

Maintenance mode

ECO mode

Parallel redundancy mode (system expansion)

Frequency converter mode

LBS mode
Normal mode
As shown in Figure 1-3, the mains is rectified by the UPS rectifier and then inverted by the inverter to
supply uninterrupted AC power to the loads. At the same time, the charger will charge the battery.
Rectifier input switch
Mains input
Battery charger
Output switch
Inverter Rectifier
UPS output
Battery
Inverter switch
Figure 1-3 Schematic diagram of normal mode
Battery mode
As shown in Figure 1-4, the operation mode in which the battery provides backup power supply to the
loads through the rectifier and inverter is called battery mode. Upon mains failure, the system will
automatically transfer to the battery mode with no load power interruption. When the mains is recovered,